Field Guide

Mullein immigrated to America along with Europeans, and with them it has spread across the continent. Its fuzzy, green-gray rosettes of leaves and tall spikes of yellow flowers make it easy to identify.

Moth mullein is a native of Eurasia introduced to our continent in the early 1800s. Since then, it has spread across North America. It’s named because the fuzzy flower, with 2 antennalike stamens, looks something like a moth.

Although the funnel-shaped, 5-lobed flowers look something like the petunias you find at garden centers, our wild petunia is not related to them. This ruellia often has crinkled hairs in 2 narrow, lengthwise bands on opposite sides of the stalk.

Running buffalo clover spreads by sending out long, creeping runners. Now endangered, this native perennial once flourished along streams and buffalo trails throughout the grasslands of the eastern and central United States.

Small blue, lavender, or white flowers shaped like cornucopias dance along the tall stems of this Carolina larkspur, which grows in prairies and grasslands.

Ground plum is a legume that bears plumlike, edible fruits. Its short, spikelike clusters of pea flowers can be white, cream, yellow, pink, or violet.

These two species of sweet clover are present all over America. Although they have been planted for forage, as bee plants, and as nitrogen-fixers, white and yellow sweet clover are now classified as invasive for their weediness and the problems they pose for natural habitats.

Bird’s-foot trefoil forms low patches of bright yellow flowers along roadsides, having been planted to stabilize soil after road construction. Up close, it clearly has pea flowers. The leaves are cloverlike, with two leafy stipules at the base of each.

Pencil flower is small and often overlooked. It has wiry stems, long, bristly hairs, three-parted leaves, and orangish-yellow flowers.

Wood betony has a tight spiral of tubular, hooded yellow flowers atop a plant adorned with deeply incised, fernlike leaves that are about as attractive as the flowers themselves. In early spring, these leaves have a beautiful wine-red coloration.